package com.service.user;

import java.util.Enumeration;

import javax.servlet.http.HttpServletRequest;

public interface LogService {
  /** 获取客户端ip地址 */
  default String getIpAddress(HttpServletRequest request) {
    String ip = null;
    // X-Forwarded-For：Squid 服务代理
    String ipAddresses = request.getHeader("X-Forwarded-For");
    System.out.println("====ipAddresses:" + ipAddresses);
    Enumeration<String> headerNames = request.getHeaderNames();
    String unknown = "unknown";
    if (ipAddresses == null || ipAddresses.length() == 0 || unknown.equalsIgnoreCase(ipAddresses)) {
      // Proxy-Client-IP：apache 服务代理
      ipAddresses = request.getHeader("Proxy-Client-IP");
    }

    if (ipAddresses == null || ipAddresses.length() == 0 || unknown.equalsIgnoreCase(ipAddresses)) {
      // WL-Proxy-Client-IP：weblogic 服务代理
      ipAddresses = request.getHeader("WL-Proxy-Client-IP");
    }

    if (ipAddresses == null || ipAddresses.length() == 0 || unknown.equalsIgnoreCase(ipAddresses)) {
      // HTTP_CLIENT_IP：有些代理服务器
      ipAddresses = request.getHeader("HTTP_CLIENT_IP");
    }

    if (ipAddresses == null || ipAddresses.length() == 0 || unknown.equalsIgnoreCase(ipAddresses)) {
      // X-Real-IP：nginx服务代理
      ipAddresses = request.getHeader("X-Real-IP");
    }

    // 有些网络通过多层代理，那么获取到的ip就会有多个，一般都是通过逗号（,）分割开来，并且第一个ip为客户端的真实IP
    if (ipAddresses != null && ipAddresses.length() != 0) {
      ip = ipAddresses.split(",")[0];
    }

    // 还是不能获取到，最后再通过request.getRemoteAddr();获取
    if (ip == null || ip.length() == 0 || unknown.equalsIgnoreCase(ipAddresses)) {
      ip = request.getRemoteAddr();
    }
    return ip;
  }

  /**
   * 添加注册记录
   *
   * @param userId 用户编号
   */
  void addARegisterLog(String userId);

  /**
   * 游客进入（打开网页时调用)时添加网页浏览记录
   *
   * @param httpServletRequest http请求，用以获取ip地址
   */
  void visitorCome(HttpServletRequest httpServletRequest);

  /**
   * 游客离开时记录离开时间
   *
   * @param httpServletRequest http请求，用以获取ip地址
   */
  void visitorLeave(HttpServletRequest httpServletRequest);

  /**
   * 用户登录成功时添加登录记录
   *
   * @param httpServletRequest http请求，用以获取ip地址
   * @param userId 用户编号
   */
  void userCome(String userId, HttpServletRequest httpServletRequest);

  /**
   * 用户离开网页时记录离开时间
   *
   * @param httpServletRequest http请求，用以获取ip地址
   * @param userId 用户编号
   */
  void userLeave(String userId, HttpServletRequest httpServletRequest);

  /**
   * 添加错误日志
   *
   * @param title 日志主题
   * @param content 日志内容
   * @return 添加成功返回1，否则返回0
   */
  int addAErrorLog(String title, String content);
}
